bpo-32670: Enforce PEP 479. (#5327)

1 files changed, 9 insertions, 5 deletions

diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst
index aa31410..42b99cc 100644
--- a/Doc/library/exceptions.rst
+++ b/Doc/library/exceptions.rst
@@ -367,17 +367,21 @@ The following exceptions are the exceptions that are usually raised.
    raised, and the value returned by the function is used as the
    :attr:`value` parameter to the constructor of the exception.
 
-   If a generator function defined in the presence of a ``from __future__
-   import generator_stop`` directive raises :exc:`StopIteration`, it will be
-   converted into a :exc:`RuntimeError` (retaining the :exc:`StopIteration`
-   as the new exception's cause).
+   If a generator code directly or indirectly raises :exc:`StopIteration`,
+   it is converted into a :exc:`RuntimeError` (retaining the
+   :exc:`StopIteration` as the new exception's cause).
 
    .. versionchanged:: 3.3
       Added ``value`` attribute and the ability for generator functions to
       use it to return a value.
 
    .. versionchanged:: 3.5
-      Introduced the RuntimeError transformation.
+      Introduced the RuntimeError transformation via
+      ``from __future__ import generator_stop``, see :pep:`479`.
+
+   .. versionchanged:: 3.7
+      Enable :pep:`479` for all code by default: a :exc:`StopIteration`
+      error raised in a generator is transformed into a :exc:`RuntimeError`.
 
 .. exception:: StopAsyncIteration